Variable-speed mechanism.



N5. 754,339. PETEETED MAE. 8, 19.04. J. EAEEEE. 'VARIABLE SPEED MEGEENISM.

PPLIVATION FILED JAN. Z7, 1902.

N0 MODEL. 4 SHEETS--SHEE'II l.

, PATBNTBD MARJS, 1904,

J.PARKER. l VARIABLE SPEED MBCHANISM.

v APPLICATION FILED JAN. Z7, 1902.

4 SHEETS-SHEET 2.

N0 MODEL.

No. 754.339. yPATENTED MAR. 8.1904. J. PARKER. VARIABLE SPEED MEERANISM.. APPLICATION FILED JAN. 27,1902. N0 MODEL v 4 SHEETS-SHEET 3.

EATENTED MR. 8, 1904.

J. EAEKEE. VARIABLE SPEED MEEHENISM.n

APPLICATION FILED JAN. 27, 1902.

4 SHEETS-SHEET 4.

N0 MODEL.

Patented March 8, 1904.

JOHN PARKER, OE PROVIDENCE, RHODE ISLAND,`- AssieNoR To Biiovvn AND` ys'aARrE MANUFACTURING COMPANY, OE PROVIDENCE.RHODE ISLAhTD, ACORPORATION OF RHGDE ISLAND.

vAmABLE-.SPED mEoHANiewLf SPECIFICATION forming part of Letters Patent No, 754,339, dated March 8, 1904.

Application filed January 27, 1902. Serial No.` 91,320. (No model.) i

To all whom it may concern;

Be it known that I, JOHN PARKER, of the cityand county of Providence, State of Rho-de Island, have invented certain new and useful' Improvements in Variable-Speed Mechanism;

and I do hereby declare the following specilication, taken in connection with the accompanying drawings, forming apart of the same, to be a full, clear and exact description thereof.

EO The invention reiatas to mechanism for ef fecting variations in speedrand may be employed in various machines wherein it may be desired to Vary the speed or relative movement of the parts when using the machine I5 undervarying conditions.

In a mechanism embodying 'fthe invention motion is imparted to the mechanism to be operated through tWo rotary members so arranged and connected .that either member may 2O be driven from the other, the member which is driven being connected with the mechanism to be operated and the speed being changed by transforming the driving member into a driven member. By making one of the rotary members in the form of a cone-gear and the other in the form of a gear which may be geared to anyone of the gears of the conegear a Wide variation in the speeds of the mechanism to be operated may be obtained with gears of comparatively'small diameters and a large number of different speeds may be 'obtained with a comparatively small numbel of gears. In embodying this form of the invention in a simple mechanism certain minor .55 features of invention may be employed which are not essential to the broad features, but are advantageous in that they contribute to a compact and highly-efcient mechanism. Certain of thesefeatures relate to the means employed 4O for transforming the cone-gear from a driving member to a driven member, and vice versa, and certain other features relate to the means employed for connecting the cone-gear with the gear which forms the other rotary member.

5 In the accompanying drawings a mechanism is shwn which embodies all the features of the invention in a simple and eiiicient form.

In the drawings, Figure l is a front elevation. Fig. 2 isalsectional :vievvon line2 2 of Fig. l. vFig.A 3 is asectional 'vieWionline' 3 3 of Fig. 2, andslligsrgiv to Sare detailso'f devices to be described. V

In the mechanismshown thetwoirotary members, eitherof which may be driven from the other, consist of a cone-gear l and a gear 2, and that gear which is driven from the other is connected with ashaft 3, which may be connected with the other parts of the mechanism to be operated at different speeds through any'y suitable connecting devices. The twogears l and 2 are connected through an intermediateA gear 4:, which meshes .with the-gear 2 and. is

so mounted that it may be brought into mesh" Lwith any one'of the gears of the `cone-gear.

To enable thegear 4 to'be thus adjusted, i't'is loosely mounted upon a shaft 5, the ends of which are secured in the. arms 6 of aframe 7. This frame is supported to turn upon bushings 8 and 9, secured in the ends of the casing 10 and concentric with the gear 2, so that the gear' 4 will remain in meshwith gear 2 as the frame is swung about the axis of the gear. vThe lat-` eral position of. the gear 4 on the shaft-ggisw` determined by a shoe 11,. secured toA a slide 12 and having arms which engage opposite sidesof the gear. 'lh`e slide l2 is guided-'in the casing 10 and is held in its guides by a plate 13.- The slide and shoe are adjustedto move the gear 4 laterally by means of a handle 14, mounted upon aV pin l5, Fig. 4, which vis secured to the slide and projects upthrough a slotin the plate 13. :The gear is heldiniadjusted position by the engagement ofthe hanc dle 14 with one of a Aseries of recesses 16;..corl responding to the gears of the cOnef-gear; the handle being yieldinglyheld in engagement with the recess by a spring 17, By swingingY the frame 7 about its support and moving the gear 4 laterally the gear maybe brought into mesh with any one of the gears of the conegcar.

The frame 7 is adjusted about its axis by means of a handle 18, extending fromoneioff` the arms of the frame through a 'slot in: the casing l0, and the frame-is held in anyone of its adjusted positions by a spi-ing-pres'sedfpin 19, mounted in the handle and arranged to en-` gage any one of a series of recesses 20, which correspond to the positions of the frame required to bring the gear4 into mesh with the various gears of the cone-gear.

The cone-gear is loosely mounted on a shaft 21 and is held from lateral movement by a shoe 22, securedto the casing and engaging the opposite sides of the largest gear of the cone-gear, Figs. 1 and 2. When the conegear-is the driven member, it is connected with the shaft 3 through a gear 23, which meshes with a gear 24, fast on the shaft 3. The gear 23 it mounted in the casing 10 and forms a bearing for one end of the shaft 21, about which it is free to revolve. The gear is connectedto move longitudinally with the 'shaft by means of a collar 25, secured to the hub of the gear and having a flange fitting between collars 26 on the end of the shaft. The cone-gear and gear 23 are connected and dis-` connected through, clutch-faces 27 on the gears, arranged to be engaged or disengaged by longitudinal movement of the shaft 21. When the cone-gear is the driven member, the gear 2 is the driving memberand at this time Y the gear 2 is driven through a gear 28, se.-

cured to the shaft 21 and engaging a gear 29, which is mounted in the bushing 8. The gear 29 forms the bearing for one end of the Shaft 30, to which gear 2 is secured, and the gears 29 'and'2 may be connected or disconnected by means of clutch-faces 31, formedon the gears and arranged to be engaged or disengaged by a longitudinal movement of the shaft 30.

When clutches 27 and 31 are in engagement,

motion is transmitted from -gear 2 through gear 1 to the shaft 3, and presuming the speed zof gear 2 to be constant the shaft 3 may be given as many different speeds as there are gears in the cone-gear, being live `in the mechanism shown, the changes in speed being effected by adjustment of the intermediate gear. V

v The number of vibrations in speed may be doubled by transforming the cone-gear into a driving member and the gear '2 into a driven member-. that is, by reversing the relation of the two gears.- This is done by disconnecting the gear 1 from the shaft 3 and connecting it with the driving-gear 28 and disconnectingl gear 2 fromthe driving-gear and connecting it with shaft 3. The means for connecting the gear 1 with the driving-gear 28 consists of clutch-faces 32, formed on the gears andarranged to be engaged and disengaged by the longitudinal movement of shaft 21. The

means for connecting the gear 2 with the shaft 3 consists of chtch-faces 33, formed on said gear` and shaft and arranged to be engaged or disengaged. b y longitudinal movements of the shaft 30. I

When clutches 33 and 32 are engaged, mo, tion is transmitted from gear 1 through gear 2 to the shaft 3, and presuming the speed of gear 1 to be constant the shaft 3 may be given Aas many different speeds as there are gears in the cone-gear-ve in the mechanism shown. These five speeds will be different from the five speeds obtainable when the cone-gear is the driven member, so that ten different speeds may b e obtained with but ve gears in the cone-gear. v

When the gear 2is the driverand it is connected with the largest gear in the cone-gear, the shaft 3 is drivenV at a comparatively slow speed, while with the same gears connected and the cone-gear the driver the shaft 3 is driven at a comparatively high speed. y Thus the reversing of the relations of the two con nected gears, so that motion may be transmitted from either one to the other, enables .a

wide variation in the speed of shaft 3 with the use of gears of comparatively small diameters. This result is not dependent upon the presence in the mechanism of means for varying the relative speeds of the two gears; but in case but two speeds for the shaft 3 are desired the relative speeds of the two gears forming the rotary members may remain the same. In such case the change from one speed to the' other wouldbe effected bytransfrrning the' gears from driver to' driven, and vice versa. i

The number of variations'in the speedof shaft 3 may be increased byiproviding meansv for varying the speed of the gear 28, and in the mechanism shown this gear may be driven at either of twospeeds. Thegear 28 is driven from a driving-shaft 34, upon which is secured a lsprocket-'wheel 35, to which power may be applied. The gear 28 is connected IOO with a sleeve 36, 'secured to the shaft 21 and carrying a gear 37, which meshes with a gear 38'. The gear 38 is` mounted in the casing 10 and surrounds a sleeve 39, which in turn surf roundsthe shaft 34. The'gear 38 is freetoV turn with relation to the sleeve 39 and may be connected with the'A shaft 34v byl means of clutch-'faces 40, formed on the gear and on sprocket-wheel 35 and arranged tobe engaged or disengaged by aflongitudinal movement of l 1 O A gear41 is formed on sleeve 3,9?

and meshes with gear 28." Thegear 41 may be connected with the shaft 34 by'means of clutch-facesv 42, formed on the sleeve 39 and on a collar 43,- secured to the shaft and arranged to be engaged or dis .nga'ged by longitudinal movement of the s aft 34.

When clutch 40 is engaged,I clutch 42 is dis-l engaged and gear 28 is driven through gears 38 and 37. By shifting the shaft 34 the .clutch 40 may be disengaged and clutch 42 engaged, when gear 28 will be driven by gear 41 at a different speed. i

The devices employed for shifting the shaft I34 consist of a lever 44, pivoted at 45 and pro-- vided with teeth 46 at one end for engaging a series of annular teeth 47 on the end of shaft 34. The lever is swung in one direction or the other to shift the shaft by means of a crankpin 48, formed on the end of a shaft 49 and ISO engaging a slot in the'lever. The shaft is rocked in one direction or the other by a handle 51, secured to its outer end.

The shafts 2l and 30 are' moved longitudinally by meansof 4a rock-shaft 52, journaled in the casing and provided with gear-teeth arranged to v engage annular gear-teeth 53, formed on the sleeve 36, and similar teeth 54, formed on a sleeve 55, secured to shaft 30. An arm 56 is secured to the rear-end of the rock-shaft 52 and is provided with a slot 57, in which works a crank-pin 58, formed on the end of a shaft 59. A handle is secured to the front end of shaft 59, by which the shaft may be turned to turn rock-shaft 52 in either direction. When the handle 60 is in the position shown, none of the clutches 27, 31, 32,

and 33 are in engagement. If the handle is moved downward, the shafts 21 and 30 will be through gear 2.

moved to the right, thus engaging clutches 27 and 31, in which case motion will be transmitted to the shaft 3 from gear 2 through gear Al, while if the handle is [moved upward the shafts will be moved to the left, engaging clutches 32 and 33, in which case motion will be transmitted from the gear 1 to shaft 3 What I claim as my invention, and desire to secure by Letters Patent, isl y1. `A variable-speed mechanism comprising two rotary members mounted to rotate about lfixed axes, and means for transmitting motion from either rotary member through the other to the mechanism to be operated, substantially vas described. 2. A variable-speed mechanism comprising two rotary members, means for transmitting motion from leither rotary member through the other to the mechanism to be operated, and

means for varying the relative speeds of the two members,- substantially as described.

3. A variable-speed mechanism comprising two gears mounted to rotate about fixed axes and so connected that the motion of one is transmitted to the other, means for reversing the relation of said gears as driver and driven, and means for connecting either of said gears to the mechanism to be operated, substantially as described. y

4. A variable-speed mechanism comprising a cone-gear and a second gear, means forconynecting any one of the-gears ofthe cone-gear rwith the second gear, means for connecting either the cone-gear or second gear to the.

two gears so connected that the motion of one is transmitted to the other, a driver, means for connecting either of said gears with the driver without changing the position of said driver,

and means for connecting either of 'said gears with themechanism to be operated, substantially as described.

6. A variable-speed mechanism comprising a cone-gear and a second gear, means for connecting any one ofthe gears of the cone-gear with the second gear, a driver, means for connecting either the vcone-gear or the second gear with the driver, and means for connecting either the cone-gear or the second gear with the mechanism to be operated, substantially as'described.

7. A variable-speed. mechanlsm comprlslng two gears mounted to rotateabout fixed axes andso connected that motion is transmitted from one to the other, mechanism for'driving either of said gears, clutches for connecting.

and disconnecting each of said gears with the drlving mechanism, mechanism operated from said gears, and clutches for connecting and disconnecting each of said gears with said driv ing mechanism, substantially as described.

8. A variable-speed mechanism comprising a cone-gear 1, a gear 2, an adjustable intermediate gear 4, for connecting any one of the gears vof cone-gear 1 with gear 4, a 4shaft 3,

gear 24 secured thereto, gear 23 meshing with gear 24, clutches 27 and 33, gears 28 and 29, clutches 32 and 31, and means ,for engaging either clutchesy 27 and 31 or clutches 32 and 33, substantially as described.

9. The combination of two rotary members, means for transmitting motion from one member to the other, two connected driving members, two connected driven members, coupling j and uncouphng devices between one rotary member and one driving and one drivenmember, similar devices between the other rotary' IOO member and the otherlriving and driven meme bers, substantially as described.

' JOHN PARKER.

Witnesses: j

' i W. H. THURs'roN, J. H. TrrunsToN. 

